Richer AI Gateway traces, full gateway coverage for the Anthropic and Google GenAI SDKs, seven insurance-agent evals, and a wave of Observe polish

AI Gateway traces now carry your caller metadata, request-body fields, and allowlisted headers as span attributes, and calls made with the Anthropic SDK or Google GenAI SDK get the same traces, cost attribution, budgets, and rate limits as OpenAI-format calls.